Your data on Solvissima

This page is an English translation provided for convenience; the French version of this page is the legally binding one.

Who

The site solvissima.com is published by NES STUDIO (SASU). Solvissima is a registered trademark, operated under licence by NES STUDIO. For any question about your data: infos@mnemosia.net. The site is hosted in France, at OVH.

Without an account

You can play everything without an account. Your games, your records and your settings (theme, puzzle in progress) stay in your browser and never leave it. If you clear your browser data, they disappear; we keep no copy of them.

At the end of every game, one anonymous line

When you finish a puzzle, the site sends the server a line that describes the game — puzzle identifier, duration, mistakes, hints, guesses, aids used, the cell and duration of the longest stall — and nothing that identifies you: no account, no browser identifier, no IP address (it is used for a few seconds to limit abuse, then is not kept). These lines are used to work out, puzzle by puzzle, the median time and the cell where games stall the most. They can never be linked to a person, even by us, and are kept indefinitely.

With an account

An account is used for two things: finding your games again from one device to another, and appearing on the leaderboard. We then record your email address, your username, the date the account was created, your games (the same information as above, linked to your account, and, more recently, the exact technique you stall on most often), the practice puzzles you have solved (technique and number, deleted with your account) and, if you choose to declare it, your country — optional, shown on the leaderboard, never inferred from your address. Your account games and the anonymous lines are never matched to each other. The theme you choose from "My account" (light, dark, or automatic) is also saved to your account, to follow you from one device to another.

Signing in

No password: a link sent by email, valid for 15 minutes and usable once. A session cookie (mnemosia_session) keeps you signed in for 90 days. It is the only cookie set by the site; there is no audience measurement tool and no tracker. Emails are sent through Brevo (a European provider) in plain text, without a pixel or tracking link. Replies arrive in our Google Workspace mailbox.

Audience measurement

To know how many people visit the site, we use Umami, an audience measurement tool hosted on our own servers, in France. It sets no cookie and no storage on your device, and does not track you from one site to another. Your IP address is not kept: it is only used to count the day's visits and infer your country, then it is forgotten. The statistics we look at are always aggregated, never individual.

Deleting your data

From the "My account" page, you can delete your account yourself, immediately: address, username, games and sessions are erased for good. The username cannot be reused by someone else for 30 days. The anonymous lines are not affected: they never belonged to you in the first place.

Your rights

Seeing and exporting your data, correcting it, deleting it: deletion and access are done from "My account"; for everything else, write to infos@mnemosia.net, we reply within a month.

Advertising

Advertising is served by Google AdSense to visitors without a subscription, on reading pages and never during a game. Google may set advertising cookies after your consent, requested by a banner on your first visit; without consent, ads are non-personalised. Solvissima+ subscribers see no advertising and no advertising script is loaded for them.

What doesn't exist yet, and that we'll announce here when it does

A paid subscription for coaching; payment will go through a provider, no card data will pass through us. If this changes, this page will say so beforehand.